Wrench.



J. EHRHARD.

WRENCH.

APPLIGATIUN FILED APRJO, 1914 Patented Mar. 2, 1915.

W/ T/VESSE S A TTUR/VEYS THE MORRIS PETERS Cu. PHOTQLITHO.. WASHING roN,D. C

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siyeiatioh of Letters raient,

Patented Mar.. e, reis.

Applicationled April 1G, 1914. Serial No. 830,399.

To all whom t may concern.'

Be it known that 1, JosEPi-I EHRHARD, a citizen of the United States,residing at Curtis, inthe county of lVoodwardand State of Oklahoma, haveinvented certain new and usefullmprovements in Wrenches, of which thefollowing is a specification.v

My invention rrelates to wrenches, the more particular purpose of myimprovement being to produce a wrench of comparatively simpleconstruction and admitting of a great variety of uses.l y Y My inventionfurther relates to means for rendering the wrench adjustable quickly andyet accurately.

My invention contemplates various other advantageous features, for the,rpurpose of improving the general eiiiciency of the wrench.

Reference is made to the accompanying drawings forming a part ofthisspe'cfiiication, and in which like letters indicate like Figure 1 isa 'side `elevation of my improved wrenchcomplete, and showing in fulland dotted lines, respectively, various movable parts as occupyingdifferent positions. Fig. 2 is a central section through the wrench,complete. Fig. 3 is a top view, showing the wrench partly in plan andpartlyin section. Fig. 4 is a side elevation, showing .the wrench asused without the slide.4 Figa is a section, on the line 5--5 of Figrl,looking in the direction of the arrow.

carrying a bearing 5, and extending through l TWoa'rms are shown at 3,4, the arm 4 this bearingand through the adjacent end of the arm 3 is'abolt 6. An adjusting screw 7 is carried by the4 arm 3 and used as alimiting stop for preventing excessive travel of the two arms 3, 4relatively to (each other.

` A-A leaf spring 3f is secured by a fastening 3b to the arm 3,' and isused for pressing the arms apart,'and thus holding them in a pre'- 'siedetermined normal relative` `position The arms 3, 4 are providedwithgripping surfaces 8 and with lugs 9 bounding these gripping sui'facesand-serving 'as limiting stopsfor the articles to be held between thegri'pping surfaces 8. The arm 3 is provided with a groove 10. A slide 11is carried by the arm 3, and fits into the groove 10, being providedwitha tongue 12 (see Fig. 5) for this purpose. The slide 11 is provided withan opening 13. .AV bolt 14, provided with a head 15, extends into thisopening, through a hole 14a, and engages a nut 16 lodged with- 1n thisopening.

A'ho'od 17 is fitted upon the slide 11, and 1s `provided with a slopingwall 18, mating a slopingsurface 18a with which the slide 11 1sprovided, as indicated in Fig. 2. The hood-17 ,carries aV strap 19extending around the. arm 3. By turning the bolt 14 by aid of its head15, the slide 11 and hood 17 are adjusted relatively to` each other, andif the bolt- 14 be turned far enough, the sloping surface 18 of theslide 11 is drawn against the matingsurface 18 of the hood, so that thestrap 19 is jammed tightly against theV Athe slide 11 rigidly upon thearm 3. Therefore, theoperator by loosening the bolt 14 and adjusting theslide 11 and hood 17 bodily along the arm 3, and then tightening theboltl, may lclamp, the slide 11 in any desired position along the groove10.

Thehood 17 is provided with a laterally extending portion k2O, servingas a bearing. This bearing carries a pin "22, and mounted upon this pin`is athuinb lever 21. A spring 23engages thisthumb lever and alsoengages the. adjacent wall of the hood 17, as may be understood fromFig. 3. ,The `,thumb lever 21isrprovided with a portion 24 serving as apawl Thearm 3 is provided with a number of teeth 25 arranged in astraight row, and together constitutinga ratchet, to he engaged by thepawl just I nentioned.` Y

Normally, under pressure vof the spring 23,

the thumb lever 21 ismaintained in such Y position that the'p'awl 24engages two of the teethp2. The operator, however, by pressing uponvthethumb lever 21 can disengage the pawl 24 from thete'eth 25. Thisbeing done,the slide `1 1and hood 17 can be moved in either of twodirections, provided of course the bolt 14 is not tightened. Tf theoperator does not pressupon the thumb-lever,`

21,and the bolt `14 is nottightened, the hoodV 17 andslide lljwmaybemoved to the left according to Figs. 1, 2 and 3, butcan not bemoved tothe right.

. A pair of' side bars 26 areweach providedv which one of the bolts 28may be extended, as indicated in Fig. 2.

If desired, the side bars 2G may be connected With the arm 4 and withthe slide 11, as indicated in Figs. l and 2. Again, the side bars 26 maybe connected directly With the arm 3, as indicated in Fig. 4.

The arm 4 is provided upon its lower or outer face with a number ofnotches 31, and either of the bolts 28 may be tted into any one of thesenotches, as may be understood from Fig. 4. If the side bars 26 beconnected with the arm 3, as indicated in Fig. 4, by one of `the bolts2S, the other bolt 2S may be brought into any one of the notches 3l.

By shifting the bolts 28 into different holes of the arms 3 and 4, andalso into different notches of the arm 4, the Wrench may be given avariety of different adjustments. Again, by connecting the side bars 26With the arm 4 by aid of someone of the holes 29, and also connectingthe side bars With the slide ll, as indicated in Figs. l and 2, therange of adjustments for the Wrench is still further increased. .Thegripping surfaces 8 may thus be quickly and accurately brought to fitany object to which they can be applied.

By arranging parts substantially as indicated inFigs. 1 and 2, and thentightening the bolt 14, the gripping surfaces 8 may be rendered for thetime being immovable relatively to each other.

I do not limit myself to any particular use for my Wrench, as it may beemployed in various arts and for an infinite variety ofdifferentpurposes.

Neither do I limit myself to the precise mechanism shown, as variationsmay be made therein Without departing from the spirit of myl invention.i j

Having thus described my invention.7 What I claim as new and desire tosecure by Letters Patent is as follows:

- 1. Ina Wrench, the combination of a pair of Varms provided withgripping surfaces and'movable relatively to each other, an

, adjusting screw carried by one of said arms for engaging the otherarm, a spring for pressing the arms apart, a pair of side bars,

andbolts-carried by said side bars, the said arms beingeach providedwith a plurality of means'for engagment by said bolts whereby thesidebars may be adjustably connected with said arms.

Genies of thisfpatent may be obtained for 2. In a Wrench, thecombination of a pair of arms movable relatively to each other andprovided With gripping surfaces, one 0f said arms being provided with agroove and having a slide provided with a portion extending into saidgroove, means controllable at the Will of the operator for locking saidslide in various positions of adjustment relative to the arm carryingit, and side bars connected with said slide and with the arm mating thearm upon which said slide is mounted.

3. In a Wrench, the combination of a pair of arms movable relatively toeach other, a pair of side bars pivotally connected to one of said arms,av slide engaging the other of said arms and pivotally connected to saidside bars,A a hood engaging said slide and proded With a portionencircling the arm carrying said slide, and mechanism connected withsaid slide and with said hood for moving said slide and said hoodrelatively to each other in order to cause said portion encircling thearm carrying the slide to bind against the arm and thus secure the sliderigidly thereupon.

4. In a Wrench, the combination of a pair of arms movable relatively toeach other, a slide mounted upon one of said arms, a pair of side barspivotally connected With said slide-and with the other of said arms, andmeans controllable at the will of the operator for locking said slide indifferent positions along the arm which carries it.

5. In a wrench, the combination of a pair of arms movable relative toeach other, a slide mounted upon one of said arms, a pair of side barspivotally connected with said slide and with the other of said arms, ahood engaging said slide and provided with a portion encircling the armcarrying the slide, mechanism connected with said slide and With saidhood for` moving the slide and hood relatively to each other, the saidarm carrying the slide being provided With teeth, and a springcontrolled lever carried by the hood and having a portion serving as apawl for engaging said teeth.

In testimony whereof I have signed my nameto this specification in thepresence of two subscribing Witnesses.

JOSEPH EHRI-IARD.

IVitnesses J. G. BAILEY, CHAnLns EHnHAnD.

ive cents each, by addressing the Commissioner of Patents,

Washington, D. C.

